Why Russsian is considered as a difficult language?

Why Russian is considered as a difficult language? I don't understand it.

In Russian there are only three tenses--one present, one past, one future.

Yes, there are grammatical cases in Russian language (Nominative, Genitive, Dative, Accusative, Instrumental, Prepositional) and there are some type of nouns' declination. But one can remeber declination of all these types of nouns. The declination of adjectives are easier than declination of nouns.

Why Russian is considered as a difficult language? I don't understand it.

In Russian there are only three tenses--one present, one past, one future.

Yes, there are grammatical cases in Russian language (Nominative, Genitive, Dative, Accusative, Instrumental, Prepositional) and there are some type of nouns' declination. But one can remeber declination of all these types of nouns. The declination of adjectives are easier than declination of nouns.

Then you've got Russian's often difficult idiomatic phrases (not that English is lacking in those). I'd say it adds up to a daunting learning experience for anyone who isn't thoroughly immersed in the language and culture.